<!DOCTYPE html>
<html>

<head>
	<meta charset="utf-8">
	<title></title>
	<style>
		img {
			width: 480px;
			height: 270px;
		}

		td:nth-child(2) {
			filter: grayscale();  /* 给元素加入滤镜 */
		}
	</style>
</head>

<body>

	<table>
		<tr>
			<td>
				<img src="./imgs/1.png" alt="">
			</td>
			<td>
				<img src="./imgs/1.png" alt="">
			</td>
		</tr>
	</table>
</body>

</html>